The base present in DNA, but not in RNA is

$LIST-I$	$LIST-II$
$(I)$ $\left[ Cr ( CN )_6\right]^{4-}$	$(P)$ $t_{2 g }$ orbitals contain 4 electrons
$(II)$ $\left[ RuCl _6\right]^{2-}$	$(Q)$ $\mu$ (spin-only) $=4.9 BM$
$(III)$ $\left[ Cr \left( H _2 O \right)_6\right]^{2+}$	$(R)$ low spin complex ion
$(IV)$ $\left[ Fe \left( H _2 O \right)_6\right]^{2+}$	$(S)$ metal ion in $4$+ oxidation state
	$(T)$ $d^4$ species

[Given : Atomic number of $Cr =24, Ru =44, Fe =26$ ] Metal each metal species in $LIST-I$ with their properties in $LIST-II$, and choose the correct option

→

If decomposition reaction $A(g) \to B(g)$ follows first order kinetics then the graph of rate of formation $(R)$ of $B$ against time $t$ will be

→

Compound from the following that will not produce precipitate on reaction with $AgNO _3$ is:

→

When benzoic acid dissolve in benzene, the observed molecular mass is

→

An aromatic ether is not cleaved by $HI$ even at $525\, K$. The compound is

→

The order of energy absorbed which is responsible for the color of complexes

$(A)$ $\left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+}$

$(B)$ $\left[ Ni \left( H _{2} O \right)_{4}(\text { en })\right]^{2+}$ and